[linux-2.6-block.git] / drivers / soc / versatile / soc-integrator.c

/*
 * Copyright (C) 2014 Linaro Ltd.
 *
 * Author: Linus Walleij <linus.walleij@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2, as
 * published by the Free Software Foundation.
 *
 */
#include <linux/init.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/sys_soc.h>
#include <linux/platform_device.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include <linux/of.h>

#define INTEGRATOR_HDR_ID_OFFSET	0x00

static u32 integrator_coreid;

static const struct of_device_id integrator_cm_match[] = {
	{ .compatible = "arm,core-module-integrator", },
	{ }
};

static const char *integrator_arch_str(u32 id)
{
	switch ((id >> 16) & 0xff) {
	case 0x00:
		return "ASB little-endian";
	case 0x01:
		return "AHB little-endian";
	case 0x03:
		return "AHB-Lite system bus, bi-endian";
	case 0x04:
		return "AHB";
	case 0x08:
		return "AHB system bus, ASB processor bus";
	default:
		return "Unknown";
	}
}

static const char *integrator_fpga_str(u32 id)
{
	switch ((id >> 12) & 0xf) {
	case 0x01:
		return "XC4062";
	case 0x02:
		return "XC4085";
	case 0x03:
		return "XVC600";
	case 0x04:
		return "EPM7256AE (Altera PLD)";
	default:
		return "Unknown";
	}
}

static ssize_t integrator_get_manf(struct device *dev,
			      struct device_attribute *attr,
			      char *buf)
{
	return sprintf(buf, "%02x\n", integrator_coreid >> 24);
}

static struct device_attribute integrator_manf_attr =
	__ATTR(manufacturer,  S_IRUGO, integrator_get_manf,  NULL);

static ssize_t integrator_get_arch(struct device *dev,
			      struct device_attribute *attr,
			      char *buf)
{
	return sprintf(buf, "%s\n", integrator_arch_str(integrator_coreid));
}

static struct device_attribute integrator_arch_attr =
	__ATTR(arch,  S_IRUGO, integrator_get_arch,  NULL);

static ssize_t integrator_get_fpga(struct device *dev,
			      struct device_attribute *attr,
			      char *buf)
{
	return sprintf(buf, "%s\n", integrator_fpga_str(integrator_coreid));
}

static struct device_attribute integrator_fpga_attr =
	__ATTR(fpga,  S_IRUGO, integrator_get_fpga,  NULL);

static ssize_t integrator_get_build(struct device *dev,
			       struct device_attribute *attr,
			       char *buf)
{
	return sprintf(buf, "%02x\n", (integrator_coreid >> 4) & 0xFF);
}

static struct device_attribute integrator_build_attr =
	__ATTR(build,  S_IRUGO, integrator_get_build,  NULL);

static int __init integrator_soc_init(void)
{
	static struct regmap *syscon_regmap;
	struct soc_device *soc_dev;
	struct soc_device_attribute *soc_dev_attr;
	struct device_node *np;
	struct device *dev;
	u32 val;
	int ret;

	np = of_find_matching_node(NULL, integrator_cm_match);
	if (!np)
		return -ENODEV;

	syscon_regmap = syscon_node_to_regmap(np);
	if (IS_ERR(syscon_regmap))
		return PTR_ERR(syscon_regmap);

	ret = regmap_read(syscon_regmap, INTEGRATOR_HDR_ID_OFFSET,
			  &val);
	if (ret)
		return -ENODEV;
	integrator_coreid = val;

	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
	if (!soc_dev_attr)
		return -ENOMEM;

	soc_dev_attr->soc_id = "Integrator";
	soc_dev_attr->machine = "Integrator";
	soc_dev_attr->family = "Versatile";
	soc_dev = soc_device_register(soc_dev_attr);
	if (IS_ERR(soc_dev)) {
		kfree(soc_dev_attr);
		return -ENODEV;
	}
	dev = soc_device_to_device(soc_dev);

	device_create_file(dev, &integrator_manf_attr);
	device_create_file(dev, &integrator_arch_attr);
	device_create_file(dev, &integrator_fpga_attr);
	device_create_file(dev, &integrator_build_attr);

	dev_info(dev, "Detected ARM core module:\n");
	dev_info(dev, "    Manufacturer: %02x\n", (val >> 24));
	dev_info(dev, "    Architecture: %s\n", integrator_arch_str(val));
	dev_info(dev, "    FPGA: %s\n", integrator_fpga_str(val));
	dev_info(dev, "    Build: %02x\n", (val >> 4) & 0xFF);
	dev_info(dev, "    Rev: %c\n", ('A' + (val & 0x03)));

	return 0;
}
device_initcall(integrator_soc_init);
Commit	Line	Data
f956a785 LW	1	/*
	2	* Copyright (C) 2014 Linaro Ltd.
	3	*
	4	* Author: Linus Walleij <linus.walleij@linaro.org>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2, as
	8	* published by the Free Software Foundation.
	9	*
	10	*/
	11	#include <linux/init.h>
	12	#include <linux/io.h>
	13	#include <linux/slab.h>
	14	#include <linux/sys_soc.h>
	15	#include <linux/platform_device.h>
	16	#include <linux/mfd/syscon.h>
	17	#include <linux/regmap.h>
	18	#include <linux/of.h>
	19
	20	#define INTEGRATOR_HDR_ID_OFFSET 0x00
	21
	22	static u32 integrator_coreid;
	23
	24	static const struct of_device_id integrator_cm_match[] = {
	25	{ .compatible = "arm,core-module-integrator", },
c7478038	26	{ }
f956a785 LW	27	};
	28
	29	static const char *integrator_arch_str(u32 id)
	30	{
	31	switch ((id >> 16) & 0xff) {
	32	case 0x00:
	33	return "ASB little-endian";
	34	case 0x01:
	35	return "AHB little-endian";
	36	case 0x03:
	37	return "AHB-Lite system bus, bi-endian";
	38	case 0x04:
	39	return "AHB";
	40	case 0x08:
	41	return "AHB system bus, ASB processor bus";
	42	default:
	43	return "Unknown";
	44	}
	45	}
	46
	47	static const char *integrator_fpga_str(u32 id)
	48	{
	49	switch ((id >> 12) & 0xf) {
	50	case 0x01:
	51	return "XC4062";
	52	case 0x02:
	53	return "XC4085";
	54	case 0x03:
	55	return "XVC600";
	56	case 0x04:
	57	return "EPM7256AE (Altera PLD)";
	58	default:
	59	return "Unknown";
	60	}
	61	}
	62
	63	static ssize_t integrator_get_manf(struct device *dev,
	64	struct device_attribute *attr,
	65	char *buf)
	66	{
	67	return sprintf(buf, "%02x\n", integrator_coreid >> 24);
	68	}
	69
	70	static struct device_attribute integrator_manf_attr =
	71	__ATTR(manufacturer, S_IRUGO, integrator_get_manf, NULL);
	72
	73	static ssize_t integrator_get_arch(struct device *dev,
	74	struct device_attribute *attr,
	75	char *buf)
	76	{
	77	return sprintf(buf, "%s\n", integrator_arch_str(integrator_coreid));
	78	}
	79
	80	static struct device_attribute integrator_arch_attr =
	81	__ATTR(arch, S_IRUGO, integrator_get_arch, NULL);
	82
	83	static ssize_t integrator_get_fpga(struct device *dev,
	84	struct device_attribute *attr,
	85	char *buf)
	86	{
	87	return sprintf(buf, "%s\n", integrator_fpga_str(integrator_coreid));
	88	}
	89
	90	static struct device_attribute integrator_fpga_attr =
91	__ATTR(fpga, S_IRUGO, integrator_get_fpga, NULL);
92
93	static ssize_t integrator_get_build(struct device *dev,
94	struct device_attribute *attr,
95	char *buf)
96	{
97	return sprintf(buf, "%02x\n", (integrator_coreid >> 4) & 0xFF);
98	}
99
100	static struct device_attribute integrator_build_attr =
101	__ATTR(build, S_IRUGO, integrator_get_build, NULL);
102
103	static int __init integrator_soc_init(void)
104	{
105	static struct regmap *syscon_regmap;
106	struct soc_device *soc_dev;
107	struct soc_device_attribute *soc_dev_attr;
108	struct device_node *np;
109	struct device *dev;
110	u32 val;
111	int ret;
112
113	np = of_find_matching_node(NULL, integrator_cm_match);
114	if (!np)
115	return -ENODEV;
116
117	syscon_regmap = syscon_node_to_regmap(np);
118	if (IS_ERR(syscon_regmap))
119	return PTR_ERR(syscon_regmap);
120
121	ret = regmap_read(syscon_regmap, INTEGRATOR_HDR_ID_OFFSET,
122	&val);
123	if (ret)
124	return -ENODEV;
125	integrator_coreid = val;
126
127	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
128	if (!soc_dev_attr)
129	return -ENOMEM;
130
131	soc_dev_attr->soc_id = "Integrator";
132	soc_dev_attr->machine = "Integrator";
133	soc_dev_attr->family = "Versatile";
134	soc_dev = soc_device_register(soc_dev_attr);
135	if (IS_ERR(soc_dev)) {
136	kfree(soc_dev_attr);
137	return -ENODEV;
138	}
139	dev = soc_device_to_device(soc_dev);
140
141	device_create_file(dev, &integrator_manf_attr);
142	device_create_file(dev, &integrator_arch_attr);
143	device_create_file(dev, &integrator_fpga_attr);
144	device_create_file(dev, &integrator_build_attr);
145
146	dev_info(dev, "Detected ARM core module:\n");
147	dev_info(dev, " Manufacturer: %02x\n", (val >> 24));
148	dev_info(dev, " Architecture: %s\n", integrator_arch_str(val));
149	dev_info(dev, " FPGA: %s\n", integrator_fpga_str(val));
150	dev_info(dev, " Build: %02x\n", (val >> 4) & 0xFF);
151	dev_info(dev, " Rev: %c\n", ('A' + (val & 0x03)));
152
153	return 0;
154	}
155	device_initcall(integrator_soc_init);